﻿//
// (C) Copyright 2009 Irantha Suwandarathna (iranthas@hotmail.com)
// All rights reserved.
//

/* Copyright (c) 2001-2008, The HSQL Development Group
 * All rights reserved.
 *
 * Redistribution and use _in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions _in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer _in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of the HSQL Development Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using EffiProz.Core.Lib;
using EffiProz.Core.Persist;
using EffiProz.Core.RowIO;
using EffiProz.Core.Indexes;
using EffiProz.Core.Errors;
using EffiProz.Core.Rights;
using EffiProz.Core.Navigators;
using EffiProz.Core.DataTypes;
using EffiProz.Core.Results;

namespace EffiProz.Core
{
    public class TableUtil
    {
        public static Table newTable(Database database, int type,
                         QNameManager.QName tableHsqlName)
        {

            switch (type)
            {

                case TableBase.TEMP_TEXT_TABLE:
                case TableBase.TEXT_TABLE:
                    {
                        return new TextTable(database, tableHsqlName, type);
                    }
                default:
                    {
                        return new Table(database, tableHsqlName, type);
                    }
            }
        }

        public static TableDerived newSubqueryTable(Database database,
                                             QueryExpression queryExpression)
        {

            QNameManager.QName name = database.nameManager.getSubqueryTableName();

            try
            {
                return new TableDerived(database, name, TableBase.SYSTEM_SUBQUERY,
                                        queryExpression);
            }
            catch (Exception)
            {
                return null;
            }
        }

        public static Table newLookupTable(Database database)
        {

            try
            {
                TableDerived table = TableUtil.newSubqueryTable(database, null);
                ColumnSchema column =
                    new ColumnSchema(QNameManager.getAutoColumnName(0),
                                     SqlType.SQL_INTEGER, false, true, null);

                table.addColumn(column);
                table.createPrimaryKey(new int[] { 0 });

                return table;
            }
            catch (CoreException)
            {
                return null;
            }
        }

        /**
         * For table subqueries
         */
        public static void setTableColumnsForSubquery(Table table,
                                               QueryExpression queryExpression,
                                               bool fullIndex)
        {

            table.columnList = queryExpression.getColumns();
            table.columnCount = queryExpression.getColumnCount();

            table.createPrimaryKey();

            if (fullIndex)
            {
                int[] colIndexes = null;

                colIndexes = table.getNewColumnMap();

                ArrayUtil.fillSequence(colIndexes);

                table.fullIndex = table.createIndexForColumns(colIndexes);
            }
        }

        public static void setTableColumnsForSubquery(Table table, SqlType[] types,
                                               bool fullIndex)
        {

            addAutoColumns(table, types);
            table.createPrimaryKey();

            if (fullIndex)
            {
                int[] colIndexes = null;

                colIndexes = table.getNewColumnMap();

                ArrayUtil.fillSequence(colIndexes);

                table.fullIndex = table.createIndexForColumns(colIndexes);
            }
        }

        public static void addAutoColumns(Table table, SqlType[] colTypes)
        {

            for (int i = 0; i < colTypes.Length; i++)
            {
                ColumnSchema column =
                    new ColumnSchema(QNameManager.getAutoColumnName(i),
                                     colTypes[i], true, false, null);

                table.addColumnNoCheck(column);
            }
        }



        public static void setColumnsInSchemaTable(Table table,
                QNameManager.QName[] columnNames, SqlType[] columnTypes, byte[] columnNullability)
        {

            for (int i = 0; i < columnNames.Length; i++)
            {
                QNameManager.QName columnName = columnNames[i];

                columnName = table.database.nameManager.newColumnSchemaHsqlName(
                    table.getName(), columnName);

                ColumnSchema column = new ColumnSchema(columnName, columnTypes[i],
                                    columnNullability == null ? true : columnNullability[i] != SchemaObjectNullability.NO_NULLS
                                                   , false, null);

                table.addColumn(column);
            }

            table.setColumnStructures();
        }
    }
}
